Which Mate are you using? I know the FM100 is only compatible with the Mate 3s. If you are using a Mate 3, this mismatch could possibly be the cause of these issues.
On Sat, Sep 7, 2024 at 7:25 PM Maverick Brown via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Dana > > I have always wired the PV negative all the way to the charge controller. > That way, the battery negative of the charge controller that happens to go > to a shunt has a proper representation of the current flow. I guess you > could put that PV negative at the same side of the shunt as the battery > negative since internally the negatives are tied together on the charge > controller. > > Did the charge controller come > AFCI? If so, you likely have to bring both PV cables through the current > sense of the AFCI. > > Also check to see if you have global charge control coordination turned > on, if so, turn it off and also check restart mode to set to two which > means restart after 90 minutes no matter what. > > > Thank you, > > Maverick > > Maverick Brown > Off-Grid Solar Commander since 2006 > Maverick Solar Enterprises, Inc. > • Solar Commander Remote Power > • SunFlow Systems Cathodic Protection > maver...@mavericksolar.com > 512-460-9825 > > > > On Sep 7, 2024, at 5:50 PM, Dana Orzel via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > OK, you wise guys. > > > I am upgrading my home off grid system from two FM 80s to two FM 100s. > The FM 80s were able to share the negative wire so you didn’t have to pull > a second negative wire. > I wired the FM 100 typical of how my FM 80s were wired with a number four > battery negative assuming and yes, I know what happens when I assume, that > the PV negative on the battery negative are common and I could just pull > one number four since going through those double 1” - 90° is a bitch. > Currently I have two # fours for output to battery, the number eight ground > and 1 # six PV input. > I got this all together and it’s charging just fine but once the battery > got full charge controllers continued to produce full output. The battery > dropped to a float and I had 2800W on each charge controller continuing to > be produced at which was turning into heat so the FM 100s were getting very > warm. The fans had not turned on, but the heat sinks were definitely very > very warm to the touch. The battery voltage is fine. > I Read the manual it doesn’t talk about being able to use one negative so > I am assuming that my problem is that the PV needs a negative and they do > not share the negative. > Has anybody else seen this or done the same wiring maneuver. > thanks in advance > > Dana Orzel - d...@solarwork.com - 208.721.7003 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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